Hi, while you continue this line of research you might consider possible ramifications and snags, and be prepared for them. The syntax for writing LHS conditions is quite complex - it's more complex than Java expressions, because the CE eval() alone will give you (almost) all of that. Rule authors may also use DRL functions, which could hide field access. If *you* author the rules, you may be able to avoid the worst, but it won't be a piece of cake. Cheers -W On 07/01/2014, milen igrachev <igrachev(a)abv.bg&gt; wrote: > Hello thanks for the quick and precise answer! > I believe that the time difference will be a bit of a problem for the IRC > chat , but i will be online (channel: #drools user: igrachev) today and will > try to check it often. However big thanks for the support and the > willingness to help! > You are saying that the code is there, but is not public and documented. > Well being not public seems to be a problem, but do you think it is > possible to give me an example with the official Drools "first rule" - > Sample.drl. The one that comes with the first Drools project. So do you > believe it will be possible to paste me some code on how to retrieve the > information that this ruleset is using one fact of type Message and two of > it's attributes - status and message. So just some code in a public > static void main (String [] args) will be great :), or any kind of > explanation :). > Once again thank you. > Have a nice day, > Milen > > > > ----Original Letter---- > From: Mark Proctor mproctor(a)codehaus.org > > About: Re: [rules-users] Is rule introspection available from the Drools > API? > > To: Rules Users List > > Sent at: Monday, 2014, January 6 16:05:33 EET > > > The code is there, but it’s not public and not documented, and the code can > be a little hard to understand - as it’s grown organically over the years. > > > > You’ll need to cast and unwrap and look at member vars. Start on the Rule > and the lhs variable. You can always pop onto irc, with live questions,and > we’ll try and respond quickly. > > http://www.jboss.org/drools/irc > > > > Mark > > > > On 6 Jan 2014, at 09:51, milen igrachev igrachev(a)abv.bg > wrote: > > > >> Hello, > >> is there a way to introspect a Drools file from within java code? > >> What I need is to be able to identify the facts and the fact attributes >> that are used in a given DRL file. > >> > >> For example if I have a rule stored in a customer.drl DRL file within my >> project, containing the following definition: > >> package myRulePackage > >> > >> import org.rules.model.Customer > >> import org.rules.model.Mambership > >> > >> rule "is eligible customer" > >> when > >> $c:Customer(status == "active") > >> Membership(customer == $c, type == "premium") > >> then > >> $c.setEligibilityStatus(true); > >> end > >> > >> What i need is a way to understand that this ruleset customer.drl is using >> two fact types - Customer and Membership and three of their attributes - >> Customer.status, Membership.customer and Membership.type. > >> > >> > >> I found some information on the internet that such functionality is not >> supported, however the information was a bit too old, so I decided to ask >> again. > >> > >> > >> Big thanks for the support! > >> Milen > >> _______________________________________________ > >> rules-users mailing list > >> rules-users(a)lists.jboss.org > >> https://lists.jboss.org/mailman/listinfo/rules-users > > > > > > _______________________________________________ > > rules-users mailing list > > rules-users(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users